serial : a small test main()

serial/t.c

@@ -7,14 +7,20 @@
 int main (int argc, char *argv[])
 {
 int	serial_in;
-int	byte, foo;
+int	byte, foo, to;
 
 serial_in = prepare_UART("/dev/ttyS0", 9600);
 fprintf(stderr, "prepare uart -> %d\n", serial_in);
 
 for (foo=0; foo<20; foo++) {
-	byte = getbyte(serial_in);
-	printf("%6d    %02x\n", foo, byte);
+	to = (foo+1) * 666;
+	byte = getbyte_to(serial_in, to);
+	if (byte < 0) {
+		fprintf(stderr, "get byte : err is %d\n", byte);
+		}
+	else	{
+		printf("%6d   %6d    %02x\n", foo, to, byte);
+		}
 	}
 
 return 0;